/**
  * The return of this function is use for testing only
  *
  * @param $list_id
  * @return string
  */
 function getStore($list_id)
 {
     $params = new stdClass();
     $params->list_id = $list_id;
     $options = $this->cb->getOptionsByListId($params);
     $buff = "Ext.create('Ext.data.Store',{fields:['option_name','option_value'],data:[";
     foreach ($options as $option) {
         $option_name = $option['option_name'];
         $option_value = $option['option_value'];
         $buff .= "{option_name:'{$option_name}',option_value:'{$option_value}'},";
     }
     $buff = rtrim($buff, ',');
     $buff .= "]})";
     return $buff;
 }